- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducersdeaf-aid setspublic address systems
- H04R 19/01 - Electrostatic transducers characterised by the use of electrets
Patent holdings for IPC class H04R 19/01
Total number of patents in this class: 324
10-year publication summary
|
34
|
23
|
32
|
28
|
21
|
25
|
14
|
17
|
10
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Robert Bosch GmbH | 42721 |
14 |
| Shure Acquisition Holdings, Inc. | 530 |
14 |
| Knowles Electronics, LLC | 600 |
13 |
| Infineon Technologies AG | 8235 |
12 |
| Wing Acoustics Limited | 25 |
9 |
| Panasonic Corporation | 20085 |
7 |
| STMicroelectronics S.r.l. | 3605 |
7 |
| Goertek Inc. | 2661 |
7 |
| InvenSense, Inc. | 1051 |
7 |
| Sonion Nederland B.V. | 151 |
7 |
| Omron Corporation | 7264 |
6 |
| TDK Corporation | 6782 |
5 |
| Epcos AG | 697 |
5 |
| Asahi Glass Company, Limited | 2771 |
5 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1950 |
5 |
| Kaetel Systems GmbH | 38 |
5 |
| National University Corporation Shizuoka University | 390 |
5 |
| Sennheiser electronic GmbH & Co. KG | 289 |
5 |
| Yamaha Corporation | 4075 |
4 |
| Cochlear Limited | 1893 |
4 |
| Other owners | 178 |